4WMM6E50直到蓄能器中的壓力克服先導閥的彈簧設(shè)定壓力， 先導閥閥芯切換+壓力補償器背面的控制壓力與回油口T相通，此時壓力補償器的閥芯切換，使P與N連通，單向閥關(guān)閉。這時，充液過程結(jié)束而泵的油液以*小的壓降通過充液閥。 R900589912 4WMM10C3X/F
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(2)泵由零壓循環(huán)狀態(tài)轉(zhuǎn)為蓄能器充液狀態(tài) 當蓄能器壓力降至下限時，先導控制閥在彈簧力作用下切換，P經(jīng)先導閥與壓力補償器的負載信號腔連通，由于彈簧的共同作用，壓力補償器換向，切斷P與N回路+泵的油液再次經(jīng)單向閥進人蓄能器回路S ，蓄能器充油，直至上一工作循環(huán) 。R900597264 4WMM10Y3X/F/V
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